PEDOT coatings

Bhandari, S. Deepa, M. Srivastava, A. K. Lai, C. Kant, R., Poly(3,4-Ethylenedioxythiophene) (Pedot)-Coated Mwcnts tethered to conducting substrates Facile electrochemistry and enhanced coloring efficiency. Macromol Rapid Commun 2009, 30,138-138. 

Futhermore, nanofiber scaffold electrodes based on PEDOT for cell stimulation were recently reported by Bolin et al. [87]. Electronically conductive and electrochemically active three-dimensional scaffolds based on electrospun poly(ethylene terephthalate) (PET) nanofibers were prepared. Vapor-phase polymerization was employed to achieve a uniform and conformal coating of poly(3,4-ethylenedioxythiophene) doped with tosylate (PEDOT tosylate) on the nanofibers. The PEDOT coatings had a large impact on the... 

Figure 15.5 Left SEM image ofPEDOT nanotubes on a neural probe tip Right mass release of dexamethasone from poly(lactide-co-glycolide) (PLGA) fibers (black), PEDOT-coated PLGA nanoscale fibers without electrical stimulation (red), and PEDOT-coated PLGA nanoscale fibers with electrical stimulation of 1 Vat the times with the circled data. (Reprinted with permission from Advanced Materials, Conducting-polymer nanotubes for controlled drug release by M. R. Abidian, D.-H. Kim and D.C. Martin, 18, 4, 405-409. Copyright (2006) Wiley-VCH)...

S. Bhandari, M. Deepa, A.K. Srivastava, C. Lai, and R. Kant, Poly(3,4-ethylenedioxythio-phene) (pedot)-coated MWCNTs tethered to conducting substrates Facile electrochemistry and enhanced coloring efficiency, Macromol. Rapid Commun., 29(24), 1959-1964 (2008). 

PEDOT)-Coated MWCNTs tethered to conducting substrates facile electrochemistry and enhanced coloring efficiency. Macro mol. Rapid Commun. 29,1959-1964. 

Figure 4.1 Setup of a PEDOT-coated Ta/Ta20s capacitor.

Several reports related to PEDOT-coated particles and PEDOT hollow particles have been pronounced in the literature [359,360]. Dispersion polymerization has been applied for PEDOT-coated PS particles fabrication. 100 nm PS nanoparticle was used as the core material [359]. hi order to improve the stability of the PS particle, DBSA was used as the surfactant. It was presumed that hydrophobic alkyl chains of the surfactant were positioned towards the surface of PS particles and the sulfonic acid group toward the water phase. EDOT monomer was adsorbed on the surface of the PS nanosphere and polymerization was initiated by the addition of the APS oxidant. PS-PEDOT core-shell structure was distinctively visualized by TEM. The doped PEDOT shell had a higher electron density than the PS core and the thickness of the PEDOT shell was ca. 8 nm. 

Another approach has been performed for preparation of PEDOT-coated silica core-shell particles and PEDOT hollow particles [360]. Silica particle size of 130 nm was utilized as the core seed and p-TSA was used as a good dopant. p-TSA played a role of improving the solubility of EDOT monomer... 

Sapurina et al. have reported the synthesis of PANI-coated waterborne polyurethane latexes in the presence of a polymeric stabihzer, polyvinylpyrrolidone (PVP). The composite particles showed a conductivity of 10 S cm i, with good colloidal and mechanical properties [73]. Recently, Huang et al. synthesized a series of PPy-coated styrene-butyl acrylate (SBA) core-shell latex particles [74], The Tg of the composite particles was shown to be determined mainly by the core material. It was reported that the conductivity of the hybrid particles could be tuned by varying the butyl acrylate content in the SBA copolymer. The composite particles showed a conductivity of 0.17 S cm Composite particles having a photochromic dye as the core and ICP as shell, and possessing properties of photoluminescence, have been studied by Jang etal. [75]. Thin PEDOT-coated PS particles (Fig. 6.14) were reported for self-assembled crystalline coUoidal arrays with a stop band in the visible regime by Han and coworkers [76]. 

Bashir, T., et al., July 2013. Stretch sensing properties of conductive knitted structures of PEDOT-coated viscose and polyester yams. Textile Research Journal 84 (3), 323—334. 

From this also fabrics could be made. An all-polymeric textile stretch sensor was prepared from the produced PEDOT-coated yams. The knitted stmcture, shown in Fig. 28.9, was made along with pure polyester yarn. The stretch sensing properties of this knitted patch were determined on a cyclic tester. 

The stretch sensing behavior of PEDOT-coated yams is shown in Fig. 28.10. It was concluded that even after several extension—contraction cycles, the knitted stmctures preserved their stretch recovery and electrical properties [35]. 

Figure 28.9 The PEDOT-coated yam (black) knitted together with polyester yam (white), together making an all-polymeric textile stretch sensor.

Figure 28.10 Stretch sensing behavior of PEDOT-coated yam at different extension (%) [35].

T. Bashir, M. Skrifvars, N.-K. Persson, Synthesis of high performance, conductive PEDOT-coated polyester yams by OCVD technique, Polym. Adv. Technol. 23 (2010) 611-617. 

T. Bashir, M. Ali, S.-W. Cho, et al., OCVD polymerization of PEDOT effects of pretreatment steps on PEDOT coated conductive fibers and a morphological study of PEDOT distribution on textile yams, Polym. Adv. Technol. 24 (2013) 210—219. 

Several synthetic methods for preparing PEDOT nanoparticles have been reported including seed polymerization, emulsion polymerization and dispersion polymerization. There have been several reports related to PEDOT-coated particles and PEDOT hollow particles [43, 44], Dispersion polymerization has been applied for PEDOT-coated Polystyrene (PS) particle fabrication. lOOnm PS nanoparticles were used as the core material [44]. Poly aniline (PANi) nanofibers have been synthesized using interfacial polymerization without templates or functional dopants [45,46]. Scanning electron microscopy (SEM) images of PANi nanofibers are shown in Figure 14.3. 

The fabrication of PEDOT coated PVDF could be done as follows ... 

After receiving PEDOT coated PVDF, PPy could be flien deposited electiochem-ically on both sides as procedures described before. 

Fig. 9 Comparison of the impedance modulus of the Pt electrode and PEDOT-coated Pt electrodes. The PEDOT/PSS was coated potentiometrically at room temperature with variable polymerization charge densities from 20, 40, 80 to 160 mC/cm. All 4 PEDOT-coated electrodes have reductions in impedance modulus at the frequency range of 10 kHz or lower while significant reductions appear at 1 kHz or lower...

Fig. 15 (a) Cyclic Voltammograms (CV) of PEDOT-coated and uncoated Pt electrodes. The CV scan rate was 100 mV/s. (b) The charge capacity as a function of deposition time (Reproduced from [33], with permission from IEEE)... 

Fig. 16 Current and voltage waveforms of a PEDOT-coated Pt electrode under pulse stimulation (a). The electrode was stimulated in PBS under a charge-balanced, cathodic-first, biphasic pulse current at 1 mC/cm at 50 Hz (b). Voltage excursion was measured under pulse stimulation currents to evaluate the PEDOT electrode charge injection capacity...

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